Zigzag carbon electric resister.



1. THOMSON. ZIGZAG CARBON-ELECTRIC RESISTER. APPLICATION FILED MAY 28 IQIB.

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` I VIII II IM III 1,299,265, Patented Apr. 1,1919

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, l l/WENToB Fm l /f/sAno Mfrs.

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UNTTlQAT members the efljeeee CQEBN ELECTRIC To all whom t may @officer/n:

Be it imown that l, JOHN Tucerseii. ff.. citizen of the Unied States, and e resiileirt of the borough of Manhatten, city of New York, County and Siete ci New York. lieve invented certain new and useful improvements in Zigzeg Carbon Elect-ric- Resistere, of which the following; a specification, rein ereiiee being made to the accompanying lrewing, forming a peri. 'bliereiiri This. invention relatee 9:10 electric eerborl zigzag resistere when employed ,for radiating heart, es in furnaces emi mufes, and an imporent eb'jeei, el elle invention is te ecnstruet a resister comprising a plum iig" emembers er which are splicecl or jeilierl ,in series in e mmi- 11er to produce en eieeiiafe mechanical :md electrical ein?, or connes-tion whereby lie resister as e Wlieie line e large eepeeiiy ai their leal emiseieri. l

As illustrating eerfzaiii specific embeiiments of ehe invention reference is mede te the aecempanying clrziwiiig and in which drawing,

Figure is e plee, A formeel o two zig-"ri members spliced or eeuljiled "cc eme, other.

Fig. 2 is a. eide er edge View of the reeisier shown in Fig. l.

Fig. is en e, im' of the seme resister.,

Fie e is eriy `l 'raneveree Section through any ei"- tiie zigmxgj eeterl porions; in other iiercle, this is e View taie-m es on the "pleine ieriieeel by the line A; and

Fig. 5 denotes n i'eerliiieeien in e detail ef the spliee l' members. x

ln my 'meiit- No. .1,1%4333 of August S, 19K?. and parrieulerly in Five. l 5 5 miel 7 and the rel-.wing e eeime e resister .which 'are View el de. liereef, en improvemerie ie speet of which :i portion. of 'the present in vention is an empliieefgien.

ln the eoreseicl paient, iiie resister is shown with beveled sides, fermirig e trapezoiclel cross-seeeiori. ln tie present invem tion, the sides of the resis'er, es shown iii the several figures, are formed wie two lievels, et C. D; thereby producing u eem: poemi repeezeiil. "in ciber werds. the eenstrectioii herein shown. is similar te that which would be ree iF .el il two meist-ers: ef the efeieseifi were leid `one en @op or .ehe meer me glieli mea/Cl mees Epeeicefen of Letters fatemi.

density, as in the port er coul' me; lm'meen sediment ipplieeter. led 9, 19153. Serial No. 236.9!57.

in Contact. ln. this Wise, when it is ieeireble to emploi7 e resister where heel; shall be drawn from its upper ami lower ieee-e, or my opposing faces, the excess of curreiis ione from e te emi. from e to d, und the excess of radiating and dispersiiig surface produced by the loevels, will be relatively uniform and symmetric-al from both of the flat faces and from both pairs eibevels, as is denoted by the arrows e, L. ln ciber words, the ciiir'entflensiizy and temperature will uniormly and prey gressively decrease from the 'feces of the resister inwardly to .its horizontal cerfe'r. is line E. ample es ie heating e square, eifoidei er eifw cular imir'iie, Where this form of resieiner is preferable to liet illuetrate in the @atene previously mentioned.

There are elec 'various instances Where resistere een be moet advantageously used of eensicierebly greater length than. ehe carbon cr graphite platee or members es ordinarily nmnuieeturecl. Sueli conditions,

een be met Dy coupling a. pl'relity ef pieiee.

end-weird; but it luie hi rie been found cxeeefliii gly (life-ult, cempl-eahed enel in many iize'eiiees impracticeifle, *Le precluee e joint which shall be eleetiicelly er meehaiii cally effective and enduring ,between Wide variations in temperature aeclf'tlie deferming stresses imparied to resister by the Welle of e, furnace. The' coupling system shown in the drawing is e eolufbioii oi". these (iiiculties and ev/'L its empioyment :m effe cient electrical miei mechanical jein er eee.- pliiig is realized ybetween the efljecen- :iig4 resister plaies or members. It will be perceived that the resister as shown in the flrewing composed ef two main members,

B, E. in which tlielzig-zegs are formeel, and 'wo terminals, J5. J', Witheet zig-zege; hence imfelving; three coupling-joints. A most eeetive joint, respects electrical confluetivity and resistance te physical deforme.-

tion. is produced in the following manner:

The end or ends of each niemeer is mer shined to produce two treneverse heee, as m, u, preferably et en angle of abeul', 5 from the Vereicel, ereeswise of the ple-te er slab, and two horizontal plane suiaeee es 7*, s, Sli litiy ebeve'zmd below the liorienl'el center E of he resislery and te' leave the veriiicel suriaeee e which serve te inierleelr enel resis .si-raies in immer, @Viren-"lle eerie Them are ceses in'prae be., 'fer wenn@ zig-zeg members, adjacent ends of which are overlapping, joining portions that are transversely interlocked and that are meintained together by means engaging the overlapping portions.

Y. A zig-zag carbon resister comprising e plurality el" zigzag resister members arranged in series and constructed so that the ediecent ends of adjacent members, are transversely interloeked, said resister also haring means for maintaining saisi enfls in lieir int :rloeked positions.

8. zig-zag carbon resister formed by s plurality of plaies having t 'nnsverse interloeks naar their ends and sloped eeeswliieli were temporarily com ressed and maintained in intimaphysical Contact by tempore-ry extraneous means, the ends oseid pluies being permanently secured together in seid intimate physical Contact by am enraging member or members Whose boerin@ i members were formed. prior in the. removal @if the een. pomry Ineens, the saisi engaging; member or being inser l prier to iflie ren'ievel of ilie temmen-My riz-ex; is. v

9, in the forming of carbon. resistere he method which eemprises prei/:Kling trims versely interleeliiig perlaions apen mijaeeut ends of zig-zag members which ee be connected in series :1mi fli seid. ends; eaeli. other, compressing seid meri and. maintaining them in inimee phy, nel eem met and While Sluis meintainsci seenH ng ille ends by suitable mei-ins which 'be ome :i of the lkml resister structure..

This speeiieeteii emi wir' Signaal in the presence of Jemima nsermn, J 15 J esili-H H. 

